cam question

[Layne]

I'm running a lunati bracket master II.  I just broke it in and put a synthetic blend in without realizing it.  Lunanti says not to run synthetic or a blend in there. Am I going to have any problems, or do I have to drain the oil again?

[VileZambonie]

I would dump the oil and run a conventional 10w30 to break it in.

[MITOYZ]

The main problem that leads to cam failure with oil is the lack of zinc,you should use a zinc additive during break in but i don't know if it would do you any good now.

[SUX2BU99]

I've decided now that with each oil change I'm going to add a bottle of GM EOS. Get it at most any GM dealer I would imagine. Then I can run whatever oil I want and not worry about how they are reformulating it.

[VileZambonie]

I remember when I worked at a GM dealer and they couldn't give EOS away. I had cases of it given to me by the parts guy. I'm down to about 4 or 5 old bottles. Ford also makes one too that I have a few quarts of.

[HAULIN IT]

The EOS was rummored to have been "reformulated" a couple years ago by an oil analyst on another forum I belong to, don't know this to be fact though. I've been using Rotella & ZZDP (a couple guys from the Buick GS club came up with it). No short term way to know what is really the answer...if you had a fleet of flat tappet cam engines, you could gain some good knowledge. Lorne 

[Jay2D2]

GM EOS is a reformulated version compared to sevearl years ago

Alos when I was working in a Ford dealership they actually stocked GM EOS and GM assembly lube because they said it was better then their own, I bleieve sever TBSs mentioned using the GM versions also

[eventhorizon66]

I've been hearing alot about this stuff lately.

http://www.kirbanperformance.com/product/445/ZDDPLUS+4-OUNCE+BOTTLE+%281%29+%237176.html

[VileZambonie]

Never heard of that stuff before but their description calls it zppd instead of zddp and says roller rockers not roller cams. Who wrote the description? Their secretary? lol

[HAULIN IT]

Sorry Guys, That's the stuff I've been using Lorne

[MITOYZ]

I,ve always used a good 10w30 oil and used zinc additive from crane cams for break in of cams or a rebuilt motor.After a couple hours run time I drain the oil and change the filter and use Royal Purple.

[eventhorizon66]

Never heard of that stuff before but their description calls it zppd instead of zddp and says roller rockers not roller cams. Who wrote the description? Their secretary? lol

LOL.  That's just a dealer.  So I wouldn't be surprised if a secretary wrote that.

Here's the company's website: http://www.zddplus.com/

[SUX2BU99]

Man, what do you trust anymore eh? If EOS has been reformulated too (presumably not for the better) than I might just buy the CompCams break-in lube additive. I was using Rotella as well but I've been hearing that's going to be reformulated too as they tighten down on diesel engine emissions and such. Hard to know what to believe. At least (I hope) I could trust that CompCams (or similar) would keep their stuff the same since it's made for exactly what I'm concerned with: wearing down a flat-tappet lobe on my flat-tappet cam using 'modern' engine oils.

[Layne]

So, uh my 305 blew up the other day.  I did find a sbc 400 for $200. I was told by a friend that my carb prolly gas soaked my oil, so my cam problem's irrelevent. Lol. Cam's trashed too, so I'm looking at another lunati. Oh yea my carbs a holley 750, and my friend says thats even too big for a 400. Should I get a dif carb or can I kinda tune it without the engine running?

[hotrod87]

I am running a holley 750 on a 383....no problems what so ever